Wall thermostat



FIG. 1 is a front elevational view of a wall thermostat showing our new design.

FIG. 2 is a top view thereof.

FIG. 3 is a bottom view thereof.

FIG. 4 is a left side elevation thereof.

FIG. 5 is a right side elevation thereof;

FIG. 6 is a rear view thereof; and,

FIG. 7 is a perspective view thereof. 

The ornamental design for a wall thermostat, as shown and described. 